Stockholders' Equity and Share-based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

Summarization of Changes in Restricted Stock Units

The following table summarizes the changes in RSUs:

	2012					2011					2010
	Number of  Restricted Stock Units			Weighted Average Grant  Date Fair Value		Number of  Restricted Stock Units			Weighted Average Grant  Date Fair Value		Number of  Restricted Stock Units			Weighted Average Grant  Date Fair Value
Nonvested, beginning of year		826,482		$	26.58		832,457		$	19.33		655,792		$	15.17
Granted		357,218			42.38		317,934			38.27		403,310			25.76
Forfeited		(71,425	)		28.95		(74,143	)		21.49		(43,536	)		13.08
Vested		(290,716	)		23.47		(249,766	)		18.80		(183,109	)		20.09
Nonvested, end of year		821,559		$	34.34		826,482		$	26.58		832,457		$	19.33

Assumptions Used to Value Grants of Stock Appreciation Rights

The following assumptions were used to value grants of SARs:

	Year Ended December 31,
	2012		2011		2010
Risk-free interest rate		—		—		4.30	%
Dividend yield		—		—		1.50	%
Expected life of option (in years)		—		—		4.8
Expected volatility (calculated historically)		—		—		42	%
Weighted-average fair value of share-based compensation awards granted	$	—	$	—	$	11.05

Summary of Stock Appreciation Rights

The following table summarizes the changes in SARs:

	2012					2011					2010
	Number of Stock Appreciation Rights			Weighted Average Exercise Price		Number of Stock Appreciation Rights			Weighted Average Exercise Price		Number of Stock Appreciation Rights			Weighted Average Exercise Price
Outstanding, beginning of year		1,118,258		$	62.81		1,289,073		$	63.08		1,351,698		$	64.51
Granted		—			—		—			—		60,000			30.01
Forfeited		(58,375	)		63.58		(132,690	)		71.76		(122,625	)		62.64
Exercised		(78,750	)		40.80		(38,125	)		40.78		—			—
Outstanding, end of year		981,133		$	64.53		1,118,258		$	62.81		1,289,073		$	63.08
Vested or expected to vest, end of year		976,933		$	64.68		1,085,878		$	63.62		1,136,816		$	64.71
Exercisable, end of year		951,133		$	65.62		958,951		$	66.92		860,271		$	70.73

Summary of Characteristics of Stock Appreciation Rights

The following table summarizes the characteristics of SARs at December 31, 2012:

	Stock Appreciation Rights Outstanding						Stock Appreciation Rights Exercisable
Range of Exercise Prices	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life-Years		Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life-Years
$30.01 – $45.74		417,880	$	39.66		2.56		387,880	$	40.40		2.39
66.60 – 76.00		342,243		73.57		1.32		342,243		73.57		1.32
97.56 – 97.56		221,010		97.56		0.20		221,010		97.56		0.20
$30.01 – $97.56		981,133	$	64.53		1.60		951,133	$	65.62		1.50

Summary of Changes in Stock Options

The following table summarizes the changes in stock options:

	2012					2011					2010
	Number of Options			Weighted Average Exercise Price		Number of Options			Weighted Average Exercise Price		Number of Options			Weighted Average Exercise Price
Outstanding, beginning of year		672,865		$	58.79		1,122,865		$	53.44		1,202,717		$	53.03
Granted		—			—		—			—		—			—
Forfeited		(475,875	)		66.97		(381,625	)		47.82		(56,002	)		55.83
Exercised		(43,845	)		32.46		(68,375	)		32.16		(23,850	)		27.37
Outstanding, end of year		153,145		$	40.91		672,865		$	58.79		1,122,865		$	53.44
Vested or expected to vest, end of year		153,145		$	40.91		672,865		$	58.79		1,122,865		$	53.44
Exercisable, end of year		153,145		$	40.91		672,865		$	58.79		1,122,865		$	53.44

Summary of Characteristics of Options

The following table summarizes the characteristics of stock options at December 31, 2012:

	Options Outstanding and Exercisable
Range of Exercise Prices	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life-Years
$32.30 – $32.30		80,905	$	32.30		0.19
50.55 – 50.55		72,240		50.55		0.83
$32.30 – $50.55		153,145	$	40.91		0.49